Correct Answer: B

Rationale: Emphysema causes V/Q mismatch due to alveolar destruction, leading to poor ventilation but adequate perfusion, resulting in hypoxemia. Flail chest impairs breathing mechanics, congestive heart failure causes diffusion defects, and Guillain-Barré syndrome affects respiratory muscles, not directly causing V/Q mismatch.

Correct Answer: A,D,E,F

Rationale:
Choice A: No hypersensitivity to allergens is correct because nonallergic asthma is not triggered by allergen exposure, unlike allergic asthma.
Choice D: Asthma flare-ups with NSAID administration is correct as NSAIDs like aspirin can trigger symptoms in some with nonallergic asthma.
Choice E: Persistence of manifestations is correct since nonallergic asthma symptoms are often persistent without a seasonal pattern.
Choice F: Positive response to corticosteroids is correct as corticosteroids are effective in managing nonallergic asthma.

Correct Answer: B

Rationale: Repositioning reduces pressure on the ulcer, promoting healing and preventing worsening.

Correct Answer: B,C,D,E,F

Rationale: Manifestations of obstructive sleep apnea include many apnea episodes per night, loud snorts after breathing cessation, breathing cessation lasting 10 seconds or longer, daytime sleepiness, and frequent loud snoring. Easily getting back to sleep is not typical, as OSA causes fragmented sleep due to frequent awakenings.

Correct Answer: A

Rationale: Hypoglycemia commonly causes tremors, sweating, and anxiety due to low blood glucose levels.